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INA219: Schematic Review

Kuan Wei Chen (Kevin Chen)
Genius 9710 points
Part Number: INA219

Dear Team,

Can you check the below schematic?

If you have any comments please let me know, appreciated!

BR

Kevin

  • 0
    TI__Mastermind 27715 points

    Hello Kevin,

    I don't see any issues with the schematic. Vcm is within the limits, the 1m shunt resistance is good, the input filter with 10-ohm resistors is good, there is a decoupling cap at VS, the address is set, and there are pull-up resistors to VS on SDA and SCL.

    A couple minor points about the address - as shown in the schematic A1 is connected to VS+ and A0 is connected to GND. This gives an address in binary of 1000100 + the LSB for R/W. For read, the LSB is high, and for write the LSB is low. Therefore the complete address here is 10001001b = 0x89h (read) and 10001000b = 0x88h (write).

    Another minor point is that the address set resistors can be 0 ohms instead of 4.7k ohms.

    Best regards,

    Ian Williams
    Applications Manager
    Current Sensing